Defense method for multi-stage network attack of power information physical system

Abstract

The invention relates to a defense method for multi-stage network attack of a power information physical system, comprising the following steps: firstly estimating the modes and resources of the attack and defense sides, adopting a staged offensive and defensive process, and determining the total number of stages of attack and defense; secondly, sequentially calculating the load shedding values ofall possible attack and defense combinations in the next stage using the optimal load shedding algorithm to obtain the potential return of each attack and defense strategy in the current stage; stipulating that the attacker and the defender are simultaneously operated, and obtaining the return matrix of the action of both parties based on the game strategy; getting the Nash equilibrium point of the game by integrating multiple stages, and constructing a decision table to provide guidance for the defense party's active defense method. The invention provides a defense method for coping with multi-stage network attacks, and comprehensively considers resources and means of both offense and defense parties, and may guide the establishment of a grid security defense mechanism.

Description

technical field [0001] The invention designs the field of security protection against network attacks of electric power cyber-physical fusion systems, and proposes a defense method for multi-stage network attacks of electric power cyber-physical systems. Background technique [0002] With the in-depth application of advanced information technologies such as perception, computing, communication, and control in power systems, power systems and communication systems are gradually and deeply integrated, becoming a typical cyber physical system (CPS). Advanced information communication technology (information communication technology, ICT) makes the power system gradually informatized, networked and intelligent, and can obtain comprehensive and detailed information of the power grid in real time, thereby realizing real-time decision-making and efficient allocation of power resources. However, the open communication network and terminal interface of the power CPS also brings a ser...

AI Technical Summary

Problems solved by technology

Attackers can cause large power grid losses through low attack costs, making it one of the threats that cannot be ignored in power CPS

However, the research on the identification method of malicious attack on the power grid and the active defense method on the grid side is still in the preliminary exploration stage, so strengthening the ability of the smart grid to deal with malicious attacks is one of the key foundations to ensure the safe and stable operation of the smart grid

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